import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 15000 // request timeout
})

// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent

    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      // config.headers['HPP-Token'] = 'b23fb7f0-1383-480b-8cf7-9fa98e980575'
      config.headers['Token'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    const res = response.data

    // if the custom code is not 20000, it is judged as an error.
    if (res.code !== 0) {
      Message({
        message: res.msg || 'Error!',
        type: 'error',
        duration: 5 * 1000
      })

      // 500200: No token; 500201: Invalid Token; 500203: User not exist
      if (res.code === 500200 || res.code === 500201 || res.code === 500202) {
        // to re-login
        MessageBox.confirm('您的登录已过期，请重新登录或点击取消留在此页', '确认退出', {
          confirmButtonText: '重新登录',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.msg || 'Error!'))
    } else {
      // 从请求头中判断token是否刷新
      const newToken = response.headers.token
      if (newToken) {
        store.dispatch('user/updateToken', newToken).then(() => {
          return res
        })
      }
      return res
    }
  },
  error => {
    console.log('err' + error) // for debug
    if (error.response) {
      switch (error.response.status) {
        // 401认证失败时，跳转回登录页，清除token信息
        case 401:
          MessageBox.confirm('您的登录已过期，请重新登录或点击取消留在此页', '确认退出', {
            confirmButtonText: '重新登录',
            cancelButtonText: '取消',
            type: 'warning'
          }).then(() => {
            store.dispatch('user/resetToken').then(() => {
              location.reload()
            })
          })
          break
        case 404:
          Message({
            message: '网络错误！',
            type: 'error',
            duration: 5 * 1000,
            showClose: true
          })
          break
        default:
          Message({
            message: error.message,
            type: 'error',
            duration: 5 * 1000,
            showClose: true
          })
      }
    }
    return Promise.reject(error)
  }
)

export default service
